Trip hook



' c. w. ANDERSON TRIP HOOK Filed July 5. 1922 Patented Jan. 1, 1924.

UNITED STATES CHARLES WILLIAM ANDERSON.

0F ANACORTES, WASHINGTON.

TRIP HOOK.-

App lication filed July 5,

To all whom it mag concern:

Be it known that I, CHARLES WILLIAM ANDERSON, a citizen of the United States, residing at Anacortes, in the county of Skagit and State of Washington, have invented certain new and useful Improvements in Trip Hooks, of which the following is a specification reference being had vto the accompanying drawings.

This invention relates to trip hooks, and has for its object to provide a hook of this character capable of efficiently supporting a load and also of releasing the load'automatically when desired.

It is another object of the invention to provide a device of this character wherein the tripping mechanism forms a part of the bill of the hook and also serves as a closure for the hook. I

It is a further object of the invention to provide a device of this character wherein the portion of the tripping mechanism used to close the bill of the hook is arranged to be engaged by means for actuating said portion to disconnect the supporting line from the hook. I It is stilla further object of the invention to provide a trip hook of this character having a trip member rotatably mounted in the bill portion thereof, a portion of said trip member cooperating with the bill of the hook to provide an opening for the reception of a supporting line.

With these and other objects in view, the invention consists in the improved construction and arrangement of parts to be here inafter more particularly described, fully claimed and illustrated in the accompanying drawings, in which Figure l is a fragmentary view of a hoisting system showing the invention applied;

Figure 2 is a side elevation of the trip hook;

Figure 3 is a longitudinal sectional view of the hook, the trip member being removed;

Figure 4 is a bottom plan View of the structure shown in Figure 2; and

Figure 5 is a perspective view of the trigger member.

Referring to the drawings, 5 designates the shank of the hook said shank being curved downwardly and outwardly and then upwardly to provide a bill 6, an opening 7 being provided in one end of the shank for the reception of a line. The bill 6 is bifurcated from the extremity of said bill to the 1922. Serial No. 572,937.

junction of said bill with the major portion of the shank, the end portions 8 of the arms of the bifurcation being provided with reg stering openings 9. It will be noted that the inner face 10 of the bifurcation is disposed in annular relation with respect to the major portion of the shank 5 and below the bight portionv of the bill to provide aguide, the purpose of which will be hereinafter described. 7

In connection with the bill 6, a novel trip member 11 isprovided, said member being substantially in the form of a wheel including a hub 12 from which a'plurality of arms 13 radiate. The outer end portion of each arm" is enlarged so as to cooperate with the adjacent arm to substantially provide a U shaped recess, one side extremity of each enlarged portion being formed into a Ii 14:; The trip member is intended to be disposed within the bifurcation of the hill 6, a bolt o-r shaft 15 being passed through the openings 9 and the hub ofthe trip member to rotatably support said member within the bifurcation. The enlarged portions of said trip member during rotation thereof are adapted to pass through the guide formed Y by the inner wall of the bifurcation, so that .th armsof the trip -member are always maintained Within the bifurcation and are prevented from contact with'the bight portion of the bill.

By the novel arrangement of the U-shaped recess, one of said arms is intended to be disposed at the junction of the bill with the shank-so as to substantially close the bifurcation, as well as the bill portion of the hook. This also positions one of the arms between the extremity of the bill and the shank, so as to form a closure, the U-shaped recess cooperating with'the bight portion of the hook to provide an opening for the reception of a line. It is obvious that when the weight of the load is on the line and the line supported by the hook that it is impossible for the arm disposed within the bifurcation to move upwardly to disengage the line.

However, when it is desired to release the line from the hook it may be accomplished by the provision of a trigger member 16 consisting of a plate having one end reduced and provided with an opening- 17* adapted to receive an actuating line, the body portion of the plate bein provided with an elongated opening 18 lxaving its ends 19 and 19 beveled. This trigger memher is adapted to be disposed between the shank 5 of the hook and the adjacent arm of the trip member, the lip 14: of said trip member being adapted to extend through the opening 18 and over the adjacent end or said opening so that said enlarged portion extends substantially obliquely of the opening 18. The trigger member 16 of course is applied at the same time the main supporting line of the load is applied, and will remain indefinitely in its inoperative position as long as the strain of the load is upon the line supporting the shank of the hook.

The trip hook may be used in connection With a hoisting or conveying arrangement comprising a main line 20 and a haul back line 21, the end of each of the lines 20 and 21 being connected to power drums independently of each other and extended over pulleys carried by a gin pole 22, the line 21 being extended around a pulley 23 anchored to a post at. Connected to the end of the main line 20 is a choker line 25, the opposite end of said choker line being passed through the opening 7 of the shank of the hook. An intermediate line 26 is extended from the connection of the choker line with the main line to the end of the haul back line 21, while extending from the junction of the line 26 with the line 21, is a trigger actuating line 27 the opposite end of said line being passed through the opening 17 of the trigger member 16.

In operation, the load is supported by a line engaged with the hook and the trigger member applied as'above described. The

ower drums are then actuated to permit the load to be conveyed to the desired point, whereupon the main line 20 is released or slackened so as to cause the strain of the load to be transferred to the trigger actuating line 27. As the strain of the load has been released to a certain extent upon reaching the discharge point, the pull of the haul back line 21 on the line 27 will cause the trigger member to swing the arm serving as the closure member for the hook outwardly. This causes movement of the arm within the bifurcation upwardly and discharges the main supporting line of the load, thereby releasing the load from the hook and per mitting the hook to be returned to the loading point. It is of course obvious that this hook may be used in connection with any hoisting or conveying system using a pair of lines, or in other words, any system whereby the strain may be transferred from the main supporting line of the hook to a line connected to the trigger member.

What is claimed is 1. A. trip hook comprising a shank having a bill, a trip member including a plurality of radiating arms rotatably mounted on the bill, one of said arms being arranged to form a part of the bill, an adjacent arm beingarranged to close the bill with respect to the shank,'and means engaged with the last mentioned arm for rotating the trip member relative to the bill and shank.

2. A trip hook comprising a shank having a bill, said bill being bifurcated for the reception of a trip member, said member including a plurality of radiating arms, said arms being arranged to close the bifurcation, one of the adjacent arms being arranged to close the entrance to the bill of the hook, and means carried by the last mentioned arm for rotating said trip member upon application of strain to said means.

3. A trip hook comprising a shank having a bill, said bill being bifurcated, a trip member including a hub having a plurality of arms radiating therefrom, said member being rotatably mounted in the bifurcation at the extremity of the arms of the'bi'furcation, each arm being arranged to close the bifurcation upon rotation of said member, the outer ends of each arm being enlarged. each pair of arms cooperating with the bill of the hook to substantially provide an opening for the reception of a supporting line, and a trigger member consisting of a plate having an elongated opening adapted to receive the arm of said trip member closing the entrance to said hook, and means for causing actuation of said trig er memher and rotation of said trip mem er to release the supporting member.

In testimony whereof I hereunto afiix my signature.

CHARLES WILLIAM ANDERSON. 

